There's no overstating the significance of September 11, 2001. Everybody has a story from that day, whether they were directly affected or watched the news helplessly from afar.

As we reach the 10-year mark since the terrorist attacks, we'd like you to share your experience then and through the years. We're putting together a retrospective, and we're curious about how this momentous event changed your life.

Where were you when the attacks occurred? Who did you reach out to? What do you remember, and how have your feelings changed over time? You could be part of CNN's 9/11 coverage.

Update: This assignment is now closed. Thank you all for sharing your memories. Be sure to check out our special 9/11 interactive that features dozens of stories from iReporters across the globe.